Question

The voltaic cell is made of the following two electrodes: 9. Fe (0.200 M) 2e Fe(s) E.d= -0.44 v, Fe(0.100 M) e Fe (0.200 M) Eed0.77 v. Which electrode works as an anode? (20 pt) al Write the cell reaction. b) Calculate E°cell and Ecel. cl 10. A Cr(ag) solution is electrolyzed, using a current of 5.30 A for 2.00 days. What mass of Cr(s) (AM: 52.0) is plated out? (F=96485 C /mol) 11. For nuclear reaction occurred in the Sun, 4H(z 1, A 1) He(z2, A 4) energy released in kJ per mole of protons? (nuclear mass: H, 1.00728; He, 4.00150; e, 0.00055. c 2.998x10 m/s.) +2e. calculate the 12. Potassium-40 decays to Ar-40 with a half-life of 1.27x10 y. What is the age of a rock in which the mass ratio of Ar-40 to K-40 is 4.2?

Answer 1

9

For a heaction do be spontanuaus the ll aviry higher pasitive that means electede atheda value f eleckode potential wll act as anede and ones potental value l act as 3+ aet as ane de a) Fe (0800 M)2 fels) 0-44 will act as anede as The cell seactfon can be witten 3Fe 0.71--0.4) Eanede 3+ Fe fels) Eull = Eathed 1.21 V pacording to Nesnst egatien Ecell 3 2+ Eall L0.200)3 0.loD 18M0.003 V )&/V0.059 1-2/3 REDMI NOTE 5 PRO MI DUAL CAMERA